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- 5- I 1 ,308 ,1 86. Patented July 1, 1919.

ROBERT J. McKAY, or PITTSBURGH, IEENNSYLVANIA,

STAY-BOLT.

incense.

Specification of letters Patent.

Patented July 1, 1919.

Original application filed May 5, 1915, Serial No. 26,130. Divided and this application filed. July 29,1916.

Serial no. 112,050.

To all whom it may concern lie it known that I, ROBERT J. MOZKAY, a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Stay- Bolts; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to stay bOlts.

The invention has relation more particularly to stay-bolts for uniting boiler-plates, such as the outside shell and fire-box shell of locon'lotives, and to the type described and clain'led in Letters Patent of the United States No. 792,863, of June 20, 1905, to

George S. Thompson, the distinctive fea tures of which being that the eye-head and eye-bolt are inter-linked by their eye-loops so as to give a certain amount of play while, at the same time, independent rotary inovell'lGlllJOf the parts is prevented. In an application filed by me on May 5, 1915, Serial No. 26,130, I described and claimed a staybolt comprising a shank having a loop, an eye-head having a loop engaging the loop of said shank, said eye-head consisting of an eye-loop portion formed with a longitudinally-divided tail-piece, a projection on said tail-piece, and a cap inclosing said tail-piece and forming an interlocking connection with said projection.

The present invention is included Within the scope of the above-named invention, and said present invention relates to a specific form of stay-bolt construction, as hereinafter set forth and claimed.

In the accompanying drawing, Figure l is a view of my improved stay-bolt, partly broken away; Fig. 2 is a longitudinal section, partly broken away; Fig. 3 is a view of the eye-loop portion of the eye-head; Fig. 4 is a view of the manner in which the eye loop portion ofthe eye'head is inserted in the eye-loop of the shank; Fig. 5 is a view of the cap; Fig. 6 is a view before the cap has been closed around the longitudinally divided tail portion; and Fig. 7 is a cross-section on the line 7-7, Fig. 2.

The numeral 2 designates the shank or bolt portion which is provided with the loop 3 at one end and the threaded portion 4: at the opposite end.

The eye-headt is composed of two parts namely, theeye-loop portion 6 and the cap 7. The eye-loop portion 6 is first formed in su'bstantially the shape shown in Fig. 3 with the diverging tail-pieces 8. In the present instance, these tail-pieces are formed withthe flat faces 9 forming, when the tail-pieces are brought. together, a hexagon. One of the tail-pieces is provided with the recessed portion 10 to receive the corresponding tongueportion 11 to form an interlocking connection between the two sections of the tailpiece when broughttogether. The tail-piece is provided with the en largeinent 12 forminga hexagon head corresponding to the hexagon formed by the angular faces 9. An additional enlargement 12" may be formed on the tail pieces between the enlargement l2 and the loop portion.

To connect the eye-loop portion 6 up with the eye-loop 3 of the shank 2, one of the tailportions 8 is inserted in the opening of the eye-loop 3 at right angles to the axial line of the shank whereupon the eye-loop portion 6 is turned around to normal position. Pressure is then applied to the tail-portion 8 of the eye-loop portion 6 to force said tail portions into contact, as indicated in Fig: 6, the tongue-portion 11 entering the recess 10 to form an interlocking connection between the parts. It should be mentioned that the eye-loop portion is heated sufficiently to permit of this pressing of the tail-portions 8 into contact. The cap 7 is then fitted over the tail-portion of the eyehead, as indicated in Fig. 6, said cap having the recess 13, said recess being hexagonal in shape to receive the hexagonal enlargement 12 on the tail-piece, as clearly inclicated in Figs. 5 and 6. The metal of the cap is then squeezed down around the tailpiece so as to inclose the same, as indicated in Fig. 2, and a very secure inter-locking connection is formed between the cap and said tail-piece due to the enlargement l2 and the hexagon formed on said enlargementas well as the seat formed in the cap.

Threads may then be formed in the outer portion of the cap, as indicated in Fig. 2, to provide for the screwing of the eye-head into a threaded opening in the boiler-sheet. It is to he understood that my invention is not limited to the short stay-bolts used for uniting the outside sheet and the fire-box sheet of boilers, but it is applicable for use as a stay-rod for connecting the top boilersheet With the front or rear hoiler-sheet for the radial stays.

WVhat I claim is:

1. A stay-bolt comprising a shank having a loop, an eye-head h ving an eye-loop en-' gaging the loop of said shank, said eye-head comprising an eye-loop portion formed With a longitudinally-divided tail-piece, an enlargement on said tail-piece, an interlocking connection between said tail-piece portions, and a cap inclosin said tail-piece and engaging said enlargement.

2. A stay-bolt comprising a shank having a loop, an eye-head having an eye-loop engaging the. loop of said shank, said eyehead comprising an eye-loop portion formed With a longitndinally-divided tail-piece, an enlargement on said tail-piece, a projection on one of said tail-piece portions adapted to engage a recess formed in the othertailpiece portion, and a cap inclosing said tailpiece and engaging said enlargement.

3. A stay-bolt comprising a shank having a loop, an eye-head having an eye-loop engaging the loop of said shank, said eye-head comprlsing an eye-loop portlon i'ormed with a longitudinally-divided tail-piece, a poly onal enlargement on said tail-piece, and a cap, having a correspondingly-shaped recess to receive said enlargement, said cap being bent around said tail-piece to inclose the same.

4:. A stay-bolt comprising a shank having a loop, an eye-head having an eye-loop engaging the loop of said shank, said eyehcad comprising an eye-loop portion formed With a longitudinally-divided tail-piece, said tail-piece being polygonal in form, a polygonal enlargement on said tail-piece, a cap having a correspondingly-shaped recess therein to receii e said tail-piece and engaging said enlargement, and said cap bent around to inclose the same.

In testimony whereof I the said Ronnn'r J. MOKAY, have hereunto set my hand.

ROBERT J. MoKAY. Witnesses JOHN F. VILL, S. F. ARMSTRONG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

